Breakdown of Mi abuela me enseñó a desatar los cordones despacio para no romperlos.
Questions & Answers about Mi abuela me enseñó a desatar los cordones despacio para no romperlos.
Me is the indirect object pronoun meaning to me.
So:
- Mi abuela enseñó... = My grandmother taught...
- Mi abuela me enseñó... = My grandmother taught me...
It marks the person who received the teaching. In this sentence, your grandmother is the one doing the teaching, and me is the person learning.
Enseñó is the preterite form of enseñar, third person singular:
- yo enseñé
- tú enseñaste
- él/ella enseñó
Here it means she taught as a completed action in the past.
Why not the others?
- enseña = she teaches / is teaching
- enseñaba = she used to teach / was teaching
So me enseñó is the natural choice if you mean one completed act of teaching, or you are simply narrating a past event.